Assumption 3 
The function \(\gamma \)  satisfies a high-gain property as in [1]}, which in our context simplifies to
\(\begin{aligned}\ \forall \, K\subseteq \mathbb {R}^n\ \text{compact} \ \exists \, c>0 \ \exists \, \sigma \in \lbrace -1,1\rbrace  \ \forall \, x\in K:&\\ \min _{\Vert w\Vert =1} \sigma w^\top \gamma (x) w \ge c&\end{aligned}\) 

